(1) Vertical cylindrical shape (Figure 24) This tree is characterized in that there is no main branch, and the bearing branches are directly planted on the middle trunk. After forming, the whole tree is vertical cylindrical. The height of the tree is 2.5 ~ 3. meters, and the crown diameter is about 2. meters. When it exceeds this height, it needs to be retracted in time, otherwise the illumination will be affected. Because there are no big branches on the trunk, we should always pay attention to the renewal and rejuvenation of the fruiting branch group, so that it can bear fruit alternately and maintain stable yield.

fig. 24: Vertical cylinder

The vertical cylinder is easy to shape, resulting in stable parts, high early yield and relatively stable. When using this tree shape, we should pay attention to controlling the growth of the upper branches of the middle trunk so as not to make it too prosperous. In orchards with deep soil layers and good fertilizer and water conditions, when the tree length is on the high side, when pruning every year, the method of changing the leading branches of the center can be adopted to make it bend and extend to control the excessive growth; Orchards with poor soil and poor fertilizer and water conditions should pay attention to maintaining the robust growth of trees and not making them too weak. We should always pay attention to rejuvenation and regeneration of fruiting branches in order to maintain high quality, stable yield and high yield and prolong fruiting years.

(2) Dwarf branches are layered. This tree is composed of trunk, middle trunk and fruiting branches. Similar to the upright cylinder, there is no main branch or side branch, and the bearing branch group is directly planted on the middle trunk. The difference is that the fruiting branches are layered and generally divided into three layers. The distance between the first layer and the second layer is 8 ~ 1 cm, and the distance between the second layer and the third layer is 3 ~ 4 cm. Intra-layer distance: the first layer is 2 ~ 3 cm, and the second layer is 1 ~ 2 cm. After forming, the height of the tree is about 3. meters.

The distribution characteristics of branches in this tree shape are: the lower part is more than the middle part, and the middle part is more than the upper part, forming a pagoda shape.

in addition, there are: small crown sparse layer shape, natural cylinder shape and double-arm fan shape.